Comparisons of human and mouse genomes reveals
A. they have very little in common.
B. they have widely different numbers of genes, and share only a few more genes than humans and pufferfish.
C. the genomes are very similar, with most of the genes unique to mice linked to size and shape.
D. the genomes are very similar, with most of the genes unique to mice linked to smell and reproduction.
E. the differences between humans and mice are mainly the introns.
Answer: D
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